Sublette measures levels that clean-air advocates say should trigger controls, but state regulators demur saying rules are unclear.
Wyofile examines the massive investment fund behind the 3,500-well NPL development and how it works.
About 18 percent of some greater sage grouse populations — a biologically meaningful amount — leave protected core-area zones in winter, University of Wyoming researchers report.
Angus M. Thuermer Jr. spoke with KHOL's Brielle Schaeffer about Gov. Matt Mead's protest of sage grouse conservation plans.
Wyoming team recommends Gov. Mead revise greater sage grouse conservation protections, to prohibit drilling in winter concentration areas.